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Finding the Fourth Proportional to 20,377.91, 30,560.94 and 7,895.15

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Solution

The fourth proportional to 20,377.91, 30,560.94 and 7,895.15 is: 11,840.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,377.91 : 30,560.94 = 7,895.15 : x
  2. Step 2: Convert to fraction form
    20,377.91/30,560.94 = 7,895.15/x
  3. Step 3: Cross multiply
    20,377.91x = 30,560.94 × 7,895.15
  4. Step 4: Simplify right side
    20,377.91x = 241,283,205.44
  5. Step 5: Solve for x
    x = 241,283,205.44/20,377.91
  6. Step 6: Final answer
    x = 11,840.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.